Edgar Degas The Rehearsal painting
Quantum physics tells us that contrary to appearances, empty space is a bubbling brew of "virtual" subatomic particles that are constantly being created and destroyed. The fleeting particles endow every cubic centimeter of space with a certain energy that, according to general relativity, produces an anti-gravitational force that pushes space apart. Nobody knows what's really causing the accelerated expansion of the universe, however.
Edgar Degas The Bellelli Family painting
These bright beacons shine to us from the edges of the visible universe and are reminders to scientists of our universe's chaotic infancy. Quasars release more energy than hundreds of galaxies combined. The general consensus is that they are monstrous black holes in the hearts of distant galaxies. This image is of quasar 3C 273, photographed in 1979.
Edgar Degas At the Races painting
From miniature black holes to distortions in the fabric of space-time, from galaxies that are eating each other to matter that can neither be seen nor detected directly...space is full of many strange things. And here are ten of the strangest.
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